Detection of Wrong Character Using Probability Transitional Patterns of Both-Direction N-gram Probabilities

摘要

The method of detecting the wrong characters and correction is proposed to improve recognition precision in character recognition. We pay attention to a technique in which N-gram probabilities are used, and propose a method which detects misspelled characters by both direction N-gram probabilities. Context probability is also introduced to be incorporated with estimated probabilities transitional patterns in both direction N-gram probabilities and context probabilities at the misspelling point. Moreover, we discuss the causes why some misspelled characters are not detected in this method. In addition, we consider the effectiveness of the method in the experiment.